chore(help): make --help descriptions consistent across the CLI

[notgitika]

Audited every --help description across the CLI surface (191 commands, 774 options, 5 arguments) for casing, verb form, and accuracy.

Rules applied:

• lowercase, no terminal punctuation
• imperative verb — add, not adds
• manage only when descendants mutate; inspect when read-only (e.g. memory was manage but is get/list only; gateway was inspect but has create/update/delete)
• every group has a verb (eval ab-test config-based had none)
• resource nouns capitalized — Runtime, Gateway, Memory, Target, Rule; harness stays lowercase
• ID/IDs, not id/ids
• (default X), not (default: X) or (defaults to X)

README.md's command tree updated where it quoted a changed description.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

AgentCore Harness Review

Verdict: Looks good

This is a purely cosmetic sweep of --help descriptions: proper-noun casing (Gateway/Runtime/Memory/Target/Rule/ID), inspect vs manage aligned to whether the router has mutating subcommands, (default: X) → (default X), and "adds a …" → "add a …" for imperative consistency. All corresponding test assertions were updated in the same commit.

I verified:

• Every updated test string (waitForText / toContain) matches exactly one non-test source occurrence — no dangling assertions.
• No leftover old strings ("inspect AgentCore Gateways", "manage agentcore harnesses", "manage harness versions", "by id" in help text, description: "adds , etc.) remain in src/.
• The inspect↔manage flip is consistent with subcommand capabilities: memory/ and harness/version/ are read-only (get/list) → inspect; gateway/, gateway/target/, gateway/rule/, gateway/connector/, eval/ab-test/, and harness/ all expose create/delete/update → manage.

Minor (non-blocking) inconsistency I noticed but wouldn't hold the PR for: src/handlers/project/invoke/index.tsx:23 still throws "a Runtime or Harness invoke subcommand is required with --json" while the router description was lowercased to "invoke a Runtime or harness …". Feel free to fix in this PR or leave for a follow-up.

No functional changes, no new features, so no telemetry or mocking concerns apply. Safe to merge.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.08%. Comparing base (76bae61) to head (27bf982).
⚠️ Report is 1 commits behind head on refactor.

Additional details and impacted files

@@             Coverage Diff              @@
##           refactor    #2207      +/-   ##
============================================
- Coverage     97.08%   97.08%   -0.01%     
============================================
  Files           544      544              
  Lines         37855    37847       -8     
============================================
- Hits          36751    36743       -8     
  Misses         1104     1104              

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