[Keyboard] Apollo87H PCB support (#16817)

* Initial Apollo87H support

* Define RGB animations and default animation

* Add proper per-key RGB support

* Adjust LED positions

* Separate delta-gamma

* Fine-tune LED positions

* fix up GAMMA revision

* fix up tabs indentation to spaces indentation

* Fixed positioning and CS-SW defs for some LEDs

* Fix INS RGB position

* Fine-tune LED positions, fix default RGB

* Update readme's

* Rename LAYOUT_87H to lowercase 87h

* Formatting gamma's rules.mk

* Formatting delta's rules.mk

* Use smaller readme image

* Use smaller README image

* First support for 87H-T-SC and 88H-T-SC

* Update README

* Fix layout naming

* Remove

* Remove EEPROM definitions, fix missing RGB LED mod/alpha definer

* Add suggestions from noroadsleft

1 files changed, 54 insertions, 0 deletions

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+# Acheron Apollo QMK firmware
+
+![apollo](https://acheronproject.com/images/apollo/delta-pictures/delta1_small.jpeg)
+
+The Apollo is Acheron Project's family of open-source, freely available tenkeyless (TKL) keyboard Printed Circuit Boards (PCB) which main feature is the per-key RGB lighting.
+
+* Keyboard Maintainer: [Gondolindrim](https://github.com/Gondolindrim)
+* Hardware Supported: open-source PCB using the [Joker template](https://acheronproject.com/joker_mcus/joker/). First units were manufactured using STM32F401 microcontroller;
+* Hardware Availability: these PCBs are open-source so you can manufacture them yourself or order them from a factory. See the [project's documentation](https://acheronproject.com/pcbs/apollo/apollo/) for more information.
+
+As of april 7, 2022, Apollo comes in three different layouts:
+
+- 87H (default ANSI)
+- 87H-T-SC (ANSI with tsangan bottom row and stepped caps);
+- 88H-T-SC (ANSI with F13, tsangan bottom row and stepped caps);
+
+See each variant's README for more information on flashing.
+
+## Flashing instructions 
+
+### Step 1: enter bootloader
+
+The DFU state in the bootloader can be accessed in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: press the physical button on the back of the PCB for at least five seconds
+* **Keycode in layout**: Press the key mapped to `RESET` if it is available (ESC key at layer 1 in the default layout)
+
+### Step 2: compile firmware
+
+After accessing the DFU state in your PCB, build the default layout using:
+
+    make acheron/apollo/87h/gamma:default # For 87H revision Gamma
+    make acheron/apollo/87h/delta:default # For 87H revision Delta
+    make acheron/apollo/87htsc:default # For 87H-T-SC (only a single revision as of may 2022)
+    make acheron/apollo/88htsc:default # For 88H-T-SC (only a single revision as of may 2022)
+
+### Step 3: flashing
+
+You can use a flashing tool like `dfu-util` or QMK Toolbox to download the resulting `*.bin` file into your PCB.
+
+### (Alternative) Compile and flash
+
+After accessing the DFU state in your PCB, you can compile-and-flash automatically using `dfu-util` through
+
+    make acheron/apollo/<variant>:default:flash
+
+### VIA firmware
+
+When compiling, just substitute `default` for `via`.
+
+## Additional info
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).