Feature/shield

[Thrifinesma]

This is the prototype implementation of #88.

Now you can set Shield (Prototype) for any TechnoType.
in rulesmd.ini

[SOMETECHNO]	            ; TechnoTypes
Shield.Strength=0           ; integer, the Shield Prototype functions if this value is set greater than 0.
Shield.Armor=none           ; armortype, determines which armor the shield is
Shield.SelfHealing=0.0      ; double, determines self healing rate for the shield. 0.0 disables self healing
                            ; 1%-100% recovers the shield strength in percentage
                            ; other number recovers the shield strength directly
                            ; a negative number deducts the shield strength.
Shield.SelfHealing.Rate=0.0 ; double - minutes, determines the frequency of self healing in minutes.
                            ; 0.0 instantly recovers the shield.
Shield.Respawn=0.0          ; double, determines the shield strength when the shield respawns. 0.0 disables shield respawn
                            ; 1%-100% respawns the shield at its strength in percentage
                            ; other number respawns the shield at the given strength directly.
Shield.Respawn.Rate=0.0     ; double - minutes,  determines the frequency of shield respawn in minutes.
                            ; 0.0 instantly respawns the shield.
Shield.Image.Normal=        ; animation, determines shield animation, required LoopCount=-1 for the anim.
                            ; If you are creating a chain of animations using the Next= tag then last animation must have LoopCount=-1 set
Shield.Image.Breaking=      ; animation, determines destroy animation of the shield. 
                            ; This anim should exist shorter than the respawn rate (if set) to create the anim normally.

In addition, a TechnoType with a Shield will show its Shield Strength. An empty shield strength bar will be left after destroyed if it is respawnable.
Buildings now uses the 5th frame of pips.shp to display the shield strength while other units uses the 16th frame (original pips.shp does not have a blue hp pip).
The frame selection of pips.shp will be customizable in the future to display the shield strength.
Pipbrd.shp will use its 4th frame to display an infantry's shield strength and the 3th frame for other units if pipbrd.shp has extra 2 frames.

[github-actions]

Nightly build for this pull request:

• compiled-dll-ff84bb3bc43f119e66ffdaa490fa0b1e152af9a9.zip
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