difft: add page (#12598)

* difft: add page

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/difft.md

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

* difft: fix example description

* Update pages/common/difft.md

* difft: update description for compared files

---------

Co-authored-by: Vítor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/common/difft.md

@@ -0,0 +1,33 @@
+# difft
+
+> Compare files or directories based on the syntax of the programming language.
+> See also: `delta`, `diff`.
+> More information: <https://difftastic.wilfred.me.uk/introduction.html>.
+
+- Compare two files or directories:
+
+`difft {{path/to/file_or_directory1}} {{path/to/file_or_directory2}}`
+
+- Only report the presence of differences between the files:
+
+`difft --check-only {{path/to/file1}} {{path/to/file2}}`
+
+- Specify the display mode (default is `side-by-side`):
+
+`difft --display {{side-by-side|side-by-side-show-both|inline|json}} {{path/to/file1}} {{path/to/file2}}`
+
+- Ignore comments when comparing:
+
+`difft --ignore-comments {{path/to/file1}} {{path/to/file2}}`
+
+- Enable/Disable syntax highlighting of source code (default is `on`):
+
+`difft --syntax-highlight {{on|off}} {{path/to/file1}} {{path/to/file2}}`
+
+- Do not output anything at all if there are no differences between files:
+
+`difft --skip-unchanged {{path/to/file_or_directory1}} {{path/to/file_or_directory2}}`
+
+- Print all programming languages supported by the tool, along with their extensions:
+
+`difft --list-languages`