Require native Git runtime and bundle full manpages

- Remove the app fallback path when native Git is unavailable and show a startup blocker instead
- Fix native level setup for staged file counting and cherry-pick parity
- Improve manpage loading/search and bundle full Git documentation assets
- Integrate Git cross-compilation into AndroidProjectTooling.sh and remove debug AAB support

app/src/test/java/solutions/tretter/githugandroid/GitHelpCommandsTest.kt

@@ -15,18 +15,39 @@ class GitHelpCommandsTest {
 
     @Test
     fun parsesGitSubcommandShortHelpCommand() {
-        val invocation = parseGitHelpInvocation("git tag -h")
-
-        assertEquals("tag", invocation?.topic)
-        assertEquals("git tag -h", invocation?.command)
+        assertNull(parseGitHelpInvocation("git tag -h"))
     }
 
     @Test
     fun parsesGitGlobalShortHelpCommand() {
-        val invocation = parseGitHelpInvocation("git -h tag")
+        val invocation = parseGitHelpInvocation("git --help tag")
 
         assertEquals("tag", invocation?.topic)
-        assertEquals("git -h tag", invocation?.command)
+        assertEquals("git --help tag", invocation?.command)
+    }
+
+    @Test
+    fun parsesManGitCommand() {
+        val invocation = parseGitHelpInvocation("man git-cherry-pick")
+
+        assertEquals("cherry-pick", invocation?.topic)
+        assertEquals("man git-cherry-pick", invocation?.command)
+    }
+
+    @Test
+    fun parsesSplitManGitCommand() {
+        val invocation = parseGitHelpInvocation("man git cherry-pick")
+
+        assertEquals("cherry-pick", invocation?.topic)
+        assertEquals("man git cherry-pick", invocation?.command)
+    }
+
+    @Test
+    fun parsesMainGitManpageCommand() {
+        val invocation = parseGitHelpInvocation("man git")
+
+        assertEquals("git", invocation?.topic)
+        assertEquals("man git", invocation?.command)
     }
 
     @Test