Index of Examples Fixes and Changes

[Jaffa-Cakes]

Description

This PR fixes and changes the following in the README.md of the examples directory:

• Added all communication examples to index
• Added ssr_router to index
• Added function_router to index
• Reordered the index into alphabetical order to match the examples directory
• Unified full-stop usage for index descriptions
• Minor heading and text tweaks
• Improved index legend

More explicit breakdowns are available in each individual commit.

Checklist

• I have reviewed my own code

The checklist item for additional tests has been omitted as they are not necessary in this situation.

[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
async_clock	99.081	99.081	0	0.000%
boids	169.249	169.249	0	0.000%
communication_child_to_parent	90.012	90.012	0	0.000%
communication_grandchild_with_grandparent	103.549	103.549	0	0.000%
communication_grandparent_to_grandchild	99.569	99.569	0	0.000%
communication_parent_to_child	87.264	87.264	0	0.000%
contexts	105.854	105.854	0	0.000%
counter	85.229	85.229	0	0.000%
counter_functional	85.414	85.414	0	0.000%
dyn_create_destroy_apps	88.012	88.012	0	0.000%
file_upload	99.314	99.314	0	0.000%
function_memory_game	162.304	162.304	0	0.000%
function_router	335.514	335.514	0	0.000%
function_todomvc	157.921	157.921	0	0.000%
futures	222.993	222.993	0	0.000%
game_of_life	105.891	105.891	0	0.000%
immutable	179.303	179.303	0	0.000%
inner_html	81.640	81.640	0	0.000%
js_callback	110.185	110.185	0	0.000%
keyed_list	197.180	197.180	0	0.000%
mount_point	84.809	84.809	0	0.000%
nested_list	111.349	111.349	0	0.000%
node_refs	92.479	92.479	0	0.000%
password_strength	1534.787	1534.787	0	0.000%
portals	95.625	95.625	0	0.000%
router	307.044	307.044	0	0.000%
simple_ssr	140.469	140.469	0	0.000%
ssr_router	372.244	372.244	0	0.000%
suspense	107.376	107.376	0	0.000%
timer	88.108	88.108	0	0.000%
todomvc	140.028	140.028	0	0.000%
two_apps	85.832	85.832	0	0.000%
web_worker_fib	149.964	149.964	0	0.000%
webgl	84.349	84.349	0	0.000%

✅ None of the examples has changed their size significantly.

[WorldSEnder]

I've taken the liberty to check for spelling of other descriptions and add some suggestions for improvements there. Might as well. Thanks for the contribution!

[Jaffa-Cakes]

@WorldSEnder

I've taken the liberty to check for spelling of other descriptions and add some suggestions for improvements there. Might as well. Thanks for the contribution!

I've added the changes you mentioned, ready for your review again. 😄

[WorldSEnder]

Looks good to me now! If some other reviewer has suggestions for the legend of "S", "F" and "SF", I'm open to ideas ^^

[futursolo]

Thank you for the pull request!