- Allow boolean options to be treated as flags if their default value is false.
- Some other CLI options can now accept no value (like a flag) including `--verbosity`
- Use `std::str::FromStr` trait to parse the given version:
    * if no value is given, then behave exactly like the `cpp-linter version` subcommand (print version and exit)
    * if a path is given look for clang-tools in that path. This only ensures the given path exists, not if the clang- tool is present; that is done later if the tool is needed.
    * expand support for version specifiers using `semver::VersionReq`. This removes the need for `lenient_semver` dependency and allows the user to specify a range of clang versions. For example, `>=14, <16`, `=12.0.1`, or simply `16` (would be treated as `=16`). See [semver::VersionReq docs][ver-req-docs] for more detail.
- adjust docs to better describe accepted/possible values.

Due to the changes in parsing the user-given version, there is a new enum, `ClangTool` that enforces type-safety about finding the clang tools (when they are needed).

* Instead of passing the tool name (as a str), the `ClangTool` enum is used to avoid typos and convey explicit support for only clang-tidy and clang-format.
* Getting the clang tool's path and version are now instance methods of the `ClangTool` enum.

[ver-req-docs]: https://docs.rs/semver/1.0.27/semver/struct.VersionReq.html

A follow-up to #204

- Allow boolean options to be treated as flags if their default value is false.
- Some other CLI options can now accept no value (like a flag) including `--verbosity`
- Use `std::str::FromStr` trait to parse the given version:
    * if no value is given, then behave exactly like the `cpp-linter version` subcommand (print version and exit)
    * if a path is given look for clang-tools in that path. This only ensures the given path exists, not if the clang- tool is present; that is done later if the tool is needed.
    * expand support for version specifiers using `semver::VersionReq`. This removes the need for `lenient_semver` dependency and allows the user to specify a range of clang versions. For example, `>=14, <16`, `=12.0.1`, or simply `16` (would be treated as `=16`). See [semver::VersionReq docs][ver-req-docs] for more detail.
- adjust docs to better describe accepted/possible values.

Due to the changes in parsing the user-given version, there is a new enum, `ClangTool` that enforces type-safety about finding the clang tools (when they are needed).

* Instead of passing the tool name (as a str), the `ClangTool` enum is used to avoid typos and convey explicit support for only clang-tidy and clang-format.
* Getting the clang tool's path and version are now instance methods of the `ClangTool` enum.

[ver-req-docs]: https://docs.rs/semver/1.0.27/semver/struct.VersionReq.html

A follow-up to #204

- Allow boolean options to be treated as flags (no value passed) if
  their default value is `false` (`--file-changes-only`, `--step-summary`,
  `--*-review`, etc).
- Some other CLI options can now accept no value (like a flag) including
  `--verbosity`
- Use `std::str::FromStr` trait to parse the given `--version`:
   * if no value is given, then behave exactly like the `cpp-linter
     version` subcommand (print version and exit)
   * if a path is given look for clang-tools in that path. This only
     ensures the given path exists, not if the clang- tool is present; that
     is done later if the tool is needed.
   * expand support for version specifiers using `semver::VersionReq`. This
     removes the need for `lenient_semver` dependency and allows the user to
     specify a range of clang versions. For example, `>=14, <16`, `=12.0.1`,
     or simply `16` (would be treated as `=16`).
     See [`semver::VersionReq` docs][ver-req-docs] for more detail.
- adjust docs to better describe accepted/possible values.

Due to the changes in parsing the user-given `--version`, there is a new
enum, `ClangTool` that enforces type-safety about finding the clang
tools (when they are needed).

* Instead of passing the tool name (as a str), the `ClangTool` enum is
  used to avoid typos and convey explicit support for only clang-tidy and
  clang-format.
* Getting the clang tool's path and version are now instance methods of
  the `ClangTool` enum.

[ver-req-docs]:
https://docs.rs/semver/1.0.27/semver/struct.VersionReq.html