[store_yaml] Embed user YAML in firmware for recovery

Adds a new opt-in component that compresses the on-disk YAML files with zstd
at codegen time and stores them in PROGMEM. The native API exposes a chunked
GetYaml RPC so a lost configuration can be retrieved from a running device.
Decompression happens client-side; no decompressor is shipped on-device.

tests/components/store_yaml/common.yaml

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+api:
+
+store_yaml:

tests/components/store_yaml/test.bk72xx-ard.yaml

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+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.esp32-ard.yaml

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+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.esp32-idf.yaml

@@ -0,0 +1,5 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.esp8266-ard.yaml

@@ -0,0 +1,5 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.host.yaml

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+<<: !include common.yaml
+
+network:

tests/components/store_yaml/test.ln882x-ard.yaml

@@ -0,0 +1,5 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.rp2040-ard.yaml

@@ -0,0 +1,5 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml

tests/components/store_yaml/test.rtl87xx-ard.yaml

@@ -0,0 +1,5 @@
+wifi:
+  ssid: MySSID
+  password: password1
+
+<<: !include common.yaml