feat: replace inotify watch path with fsnotify and clean up related tooling/docs (#204)

* Plan fsnotify migration and docs updates

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

* Refactor watch mode to fsnotify and add agent docs

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

* Fix errcheck violations in command and converter tests

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

* Complete validation for fsnotify and lint fixes

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

Dockerfile

@@ -27,7 +27,6 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     apt-get update && \
     apt-get full-upgrade -y && \
     apt-get install -y --no-install-recommends \
-    inotify-tools \
     bash \
     ca-certificates \
     bash-completion && \