Link to Getting Started in examples README

[ranile]

Description

Fixes #3315

Checklist

• I have reviewed my own code
• I have added tests

[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
async_clock	102.318	102.318	0	0.000%
boids	175.511	175.511	0	0.000%
communication_child_to_parent	95.221	95.221	0	0.000%
communication_grandchild_with_grandparent	108.886	108.886	0	0.000%
communication_grandparent_to_grandchild	105.538	105.538	0	0.000%
communication_parent_to_child	92.700	92.700	0	0.000%
contexts	110.885	110.885	0	0.000%
counter	89.205	89.205	0	0.000%
counter_functional	89.920	89.920	0	0.000%
dyn_create_destroy_apps	92.236	92.236	0	0.000%
file_upload	103.542	103.542	0	0.000%
function_memory_game	174.310	174.310	0	0.000%
function_router	347.930	347.930	0	0.000%
function_todomvc	163.356	163.356	0	0.000%
futures	227.708	227.708	0	0.000%
game_of_life	112.299	112.299	0	0.000%
immutable	188.926	188.926	0	0.000%
inner_html	86.013	86.013	0	0.000%
js_callback	112.995	112.995	0	0.000%
keyed_list	201.203	201.203	0	0.000%
mount_point	89.207	89.207	0	0.000%
nested_list	114.492	114.492	0	0.000%
node_refs	96.165	96.165	0	0.000%
password_strength	1582.842	1582.842	0	0.000%
portals	98.234	98.234	0	0.000%
router	314.007	314.007	0	0.000%
simple_ssr	143.644	143.644	0	0.000%
ssr_router	385.156	385.156	0	0.000%
suspense	110.230	110.230	0	0.000%
timer	91.756	91.756	0	0.000%
timer_functional	100.292	100.292	0	0.000%
todomvc	143.697	143.697	0	0.000%
two_apps	89.918	89.918	0	0.000%
web_worker_fib	154.516	154.516	0	0.000%
webgl	88.529	88.529	0	0.000%

✅ None of the examples has changed their size significantly.