tmt, tmt-run, tmt-try: add pages (#14921)

Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/tmt.md

@@ -0,0 +1,37 @@
+# tmt
+
+> Test Management Tool for creating, running, and debugging tests.
+> Some subcommands such as `run`, `try`, etc. have their own usage documentation.
+> More information: <https://tmt.readthedocs.io>.
+
+- List available tests, plans, and stories:
+
+`tmt`
+
+- Initialize tmt files/project structure:
+
+`tmt init`
+
+- Create a new test with a template and a link:
+
+`tmt test create --template {{beakerlib}} --link {{verifies:issue#1234}}`
+
+- List available tests, plans, or stories:
+
+`tmt {{test|plan|story}} ls {{pattern}}`
+
+- Show detailed test metadata in the given context:
+
+`tmt --context {{arch=aarch64}} test show`
+
+- Validate tmt files against the specification:
+
+`tmt lint`
+
+- Use filter:
+
+`tmt tests ls --filter {{tag:foo}} --filter {{tier:0}}`
+
+- Display help:
+
+`tmt --help`